dmrc project (mech).doc

7/27/2019 DMRC PROJECT (MECH).doc

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DELHI METRO RAIL CORPORATION LTD.

SUBMITTED BY-

JYOTI

01213503610

MECHANICAL & AUTOMATION

ENGINEERING

INDIRA GANDHI INSTITUTE OF

TECHNOLOGY


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ACKNOWLEDGEMENT

It is indeed a great pleasure for me to present this Summer Training Report on

Delhi Metro Rail Corporation as a part of the curriculum of the B.Tech.

course Mechanical & Automation Engineering

I take this golden opportunity to thank all my mentors at DMRC who with their

support

and venerated guidance made this training a real success . I express my sincere

thanks

to officers of DMRC who inspite of their busy schedule have lent their precioustime for helping me out to understand various system used in DMRC.

I will be failing in my duty if I am not mentioning the technical demonstrations

as given by the reverent staff of DMRC. There is no denying the fact that

DMRC is the epitome of modern technology and getting training at such an

organization is an exquisite learning experience that made a mark at the

profoundest part of my mind.

COMPANY PROFILE


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IntroductionMETRO is like a dream come true for Delhi, a revolutionary

change in the city transport. Delhi needs metro system in the

first place and it would change things for the better not only

for people who would be using it and but for the people living

in Delhi by reducing congestion, air pollution, noise pollution

and accidents.

The Delhi Metro is a rapid transit system serving Delhi, Gurgaon,Noida andGhaziabad in theNational Capital Region ofIndia. The network consists of six

lines with a total length of 189.63 kilometers (117.83 mi) with 142 stations of

which 35 are underground. It has a combination of elevated, at-grade and

underground lines and uses bothbroad gauge and standard gauge rolling stock.

Four types of rolling stock are used: Mitsubishi-ROTEM Broad gauge,

BombardierMOVIA, Mitsubishi-ROTEM Standard gauge and CAF Beasain

Standard gauge.

Delhi Metro is being built and operated by the Delhi Metro Rail Corporation

Limited (DMRC). As of November 2010, DMRC operates around 2,700 trips

daily between 6:00 and 23:00 running with an interval of 2 minutes 30 seconds

between trains at peak frequency.[6][7] The trains are mainly of four coaches, but

due to increase in passengers numbers, six-coach trains are also added on the

Red Line (Dilshad Garden to Rithala), Yellow Line (Jahangirpuri to HUDA city

centre), Blue Line (Dwarka sec 21 to Vaishali/NOIDA city centre) and Violet

Line (Central Secretariat to Badarpur).[4][5][7][8] The power output is supplied by

25-kilovolt, 50 Hertzalternating current through overhead catenaries. The

metro has an average daily ridership of 1.8 million commuters, and, as of July

2011, had carried over 1.25 billion commuters since its inception.[9] The Delhi

Metro Rail Corporation has been certified by the United Nations as the first

metro rail and rail-based system in the world to get carbon credits for reducing
http://en.wikipedia.org/wiki/Rapid_transithttp://en.wikipedia.org/wiki/Delhihttp://en.wikipedia.org/wiki/Gurgaonhttp://en.wikipedia.org/wiki/Noidahttp://en.wikipedia.org/wiki/Ghaziabad,_Indiahttp://en.wikipedia.org/wiki/National_Capital_Region_(India)http://en.wikipedia.org/wiki/Indiahttp://en.wikipedia.org/wiki/List_of_Delhi_metro_stationshttp://en.wikipedia.org/wiki/Broad_gaugehttp://en.wikipedia.org/wiki/Standard_gaugehttp://en.wikipedia.org/wiki/Mitsubishihttp://en.wikipedia.org/wiki/Bombardier_Transportationhttp://en.wikipedia.org/wiki/Mitsubishihttp://en.wikipedia.org/wiki/CAF_Beasainhttp://en.wikipedia.org/wiki/Delhi_Metro#cite_note-updates-5http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-P2Newtrains-6http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-6coach-3http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-coaches-4http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-P2Newtrains-6http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-7http://en.wikipedia.org/wiki/Volthttp://en.wikipedia.org/wiki/Hertzhttp://en.wikipedia.org/wiki/Alternating_currenthttp://en.wikipedia.org/wiki/Overhead_catenaryhttp://en.wikipedia.org/wiki/Delhi_Metro#cite_note-Ridership-8http://en.wikipedia.org/wiki/United_Nationshttp://en.wikipedia.org/wiki/Rapid_transithttp://en.wikipedia.org/wiki/Delhihttp://en.wikipedia.org/wiki/Gurgaonhttp://en.wikipedia.org/wiki/Noidahttp://en.wikipedia.org/wiki/Ghaziabad,_Indiahttp://en.wikipedia.org/wiki/National_Capital_Region_(India)http://en.wikipedia.org/wiki/Indiahttp://en.wikipedia.org/wiki/List_of_Delhi_metro_stationshttp://en.wikipedia.org/wiki/Broad_gaugehttp://en.wikipedia.org/wiki/Standard_gaugehttp://en.wikipedia.org/wiki/Mitsubishihttp://en.wikipedia.org/wiki/Bombardier_Transportationhttp://en.wikipedia.org/wiki/Mitsubishihttp://en.wikipedia.org/wiki/CAF_Beasainhttp://en.wikipedia.org/wiki/Delhi_Metro#cite_note-updates-5http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-P2Newtrains-6http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-6coach-3http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-coaches-4http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-P2Newtrains-6http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-7http://en.wikipedia.org/wiki/Volthttp://en.wikipedia.org/wiki/Hertzhttp://en.wikipedia.org/wiki/Alternating_currenthttp://en.wikipedia.org/wiki/Overhead_catenaryhttp://en.wikipedia.org/wiki/Delhi_Metro#cite_note-Ridership-8http://en.wikipedia.org/wiki/United_Nations


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greenhouse gas emissions and helping in reducing pollution levels in the city

by 630,000 tons every year.[10]

Planning for the metro started in 1984, when the Delhi Development Authority

and the Urban Arts Commission came up with a proposal for developing amulti-modal transport system for the city. The Government of India and the

Government of Delhi jointly set up the Delhi Metro Rail Corporation (DMRC)

in 1995. Construction started in 1998, and the first section, on the Red Line,

opened in 2002, followed by the Yellow Line in 2004, the Blue Line in 2005,

its branch line in 2009, the Green and Violet Lines in 2010 and the Delhi

Airport Metro Express in 2011.

CORPORATE OBJECTIVESVISION

A world-class innovative, competitive and profitable engineering

enterprise providing total business solutions.

MISSION

To cover the whole of Delhi with a Metro Network by the year 2021.

Delhi Metro to be of world class standards in regard to safety, reliability,

punctuality, comfort and customer satisfaction.

Metro to operate on sound commercial lines obviating the need for

Government support.

CULTURAL VALUES We should be totally dedicated and committed to the Mission.

Personal integrity should never be in doubt, we should maintain full

transparency in all our decisions and transactions.

The Organization must be lean but effective. The Corporation must project an image of efficiency, transparency,

courtesy and we mean business attitude.

Construction activities should not inconvenience or endanger public life

nor should lead to ecological or environmental degradation.

All the structures should be aesthetically planned and well maintained.
http://en.wikipedia.org/wiki/Delhi_Metro#cite_note-9http://en.wikipedia.org/wiki/Delhi_Development_Authorityhttp://en.wikipedia.org/wiki/Government_of_Indiahttp://en.wikipedia.org/wiki/Government_of_Delhihttp://en.wikipedia.org/wiki/Red_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Yellow_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Blue_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Green_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Violet_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Delhi_Airport_Metro_Expresshttp://en.wikipedia.org/wiki/Delhi_Airport_Metro_Expresshttp://en.wikipedia.org/wiki/Delhi_Metro#cite_note-9http://en.wikipedia.org/wiki/Delhi_Development_Authorityhttp://en.wikipedia.org/wiki/Government_of_Indiahttp://en.wikipedia.org/wiki/Government_of_Delhihttp://en.wikipedia.org/wiki/Red_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Yellow_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Blue_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Green_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Violet_Line_(Delhi_Metro)http://en.wikipedia.org/wiki/Delhi_Airport_Metro_Expresshttp://en.wikipedia.org/wiki/Delhi_Airport_Metro_Express


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ROLLING STOCK

Train Formation

At present each train set consist of four cars. Both ends of the train-set are

Driving Trailer (DT) cars and middle cars are Motor (M) cars.The train set can be controlled as a complete unit or as separate units for various

maintenance activities at the depot.

1) 4 car - DT-M-M-DT

The formation of the 4 car train is DTMM DT

Each DTM car pair is connected together by a semi-permanent coupler .thismeans that for service operation the train consist is fixed and cannot be

separated. However, for maintenance purposes, maintenance staff can

physically disengage the semi-permanent couplers so that maintenance

activities can be conducted on individual cars. Between each car pair, an

automatic coupler is used. This allows quick and easy coupling and decoupling

of the paired cars.

2) 6 car - DT-M-M-T-M-DT

3) 8 car - DT-M-M-T-M-T-M-DT (Here T car is the non-driving trailer

car.)

Here T car is the non-driving trailer car.

Salient Features

Broad Gauge

25 KV Supply Voltage System

DT - M - M - DT

DT - M - T - M - M - DT

DT - M - T - M - T - M - M - DT


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Three phase A.C. Induction Motor

Fail Safe braking with regenerative braking

VVVF Control

Reinforced conical rubber primary Suspension

Secondary Air Suspension Uniform Floor Height

Jerk Controlled Braking

Light Weight Stainless Steel Structure

Slip/Slide protection

Train Integrated Management System

PLC based saloon Air conditioning system

Electrically Operated and electronically controlled Saloon Door

Emergency Door ATP/ATO


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Function of air conditioning system

to control temperature to control humidity

to supply pure air

Design Conditions

Description Condition

No. of passengers :- 392

Ambient temperature:- 430 DBT& 33% RH /

390 DBT & 41%RH DBT

Inside condition:- 330 DBT&/290DBTPresent inside condition:- 240 DBT

Fresh air per passenger :- 2.3 lps

Cooling capacity:- 41 kw per unit

82 kw per car

Operating modes

COOL2

COOL2

TEMPERATURE

FALLING

TEMPERATURE

RISING

COOL1

COOL1

VENT

VENT

SET POINT

SET POINT +1CO

SET POINT

Set Point + 0.5Co

Set Point + 0.5C

Set Point + 1.0C


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Normal Operating Mode

In Normal Operating Mode A/C unit provides cooling and ventilation,

switching automatically by various sub modes to fulfil specified condition.

Emergency Operating Mode

When 3 Phase. Power supply is not available , ac will work in this mode & will

supply fresh air only.

Smoke Mode

In this mode , system shuts off the fresh air intake and provides full

recirculation of return air within the saloon.

Normal operating sub -modes

Vent mode :-

air is supplied inside saloon without any cooling

Cool-1 mode:-

air is supplied with cooling (only 50% of cooling capacity

is used)

Cool-2 mode:-

air is supplied with cooling (100% cooling capacity is used.

Main component of air conditioning system -

Refrigeration Equipment

Air Transfer Equipment

Electrical Equipment

A) Refrigeration equipment

1.Compressor

2. Condenser coil3. Solenoid valve

4. Thermal exp. Valve

5. Evaporator coil

1. Compressor


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The function of the compressor is to pump the refrigerant through the system

and to compress the low pressure, low temperature refrigerant into a high

pressure high temperature super heated vapour, to allow condensing to occur.

Type:- Semi-Hermetic Four Cylinder

Reciprocating Suction Gas Cooled

Speed:- 1450 rpm

Swept volume:- 82.21 m3/h

Displacement:-945ccm

2. Condenser

The function of the condenser coil is to reject the heat from refrigerant absorbed

by the evaporator coil and during the compression process

Type: Copper finned, copper tube,

brass frame heat exchanger

Quantity: 2 per unit

Air Flow:2700 l/s (each coil)

3. T-X valve

The TX valve regulates the refrigerant flow into the evaporator coil, expanding

the liquid from high pressure to low pressure, and causing a large drop in

refrigerant temperature.

Refrigerant R22

Range N -40 +10 o C

Factory Superheat 5 K

Max bulb temp. 100 o C

Max working pressure 28 bar


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4.Evaporator coil

The prime function of the evaporator compartment is to deliver conditioned air

to the main supply air duct that services the vehicle

Type: Copper finned, copper tube, brass frame heat

exchanger.

Quantity: 1 per unit.

Air Flow: 1350 l/s

Face Velocity: 2.5 m/s

Cooling Capacity: 41 kW

5. Dual pressure controller (DPC)

Its function is to switch off the refrigeration system in case of adverse system

condition . It monitors both the high and low refrigerant pressures. If the low

(LP) or high (HP) pressures reach a predetermined set point, the refrigeration

system will be shut down.

Range: LP 50 700 kPa

HP 300 3000 kPa

Set points:-

hp fault:- 2800 / 2500 kpaLp fault :- 50/350 kpa


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B. Air Transfer Scheme

1.Supply fan

As the name applies , it supplies the conditioned air inside saloon . It draws

back 70% of return air & 30% of fresh air & moves past t

Type: Two double inlet centrifugal blower

wheels with double shafted motor

Quantity: Two (2) per unit

Supply Air: 1350 Litres/second at 470 Pa

external static pressure

Motor:- 2.2 kw @1500rpm , 415 v

2.Condenser fan

Its function is draw the atmospheric air through condenser coil , inside which

hot refrigerant is flowing , thus making the heat rejection & condensing the

saloon

EvaporatorFresh air

Fresh air damper

Supply

fansaloon


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Type: Multi wing axial fan, 9 blades

Quantity: two (2) per unit

Direction of flow: Draw through

RPM Range: 0 2045 rpm

Motor:- 2.2 KW @1500rpm , 415 v

3.Air dampers

Their function is to control the fresh air & return( recirculated) air volume as

per requirement.

Mode fresh air return air

damper damper

Vent , partially fully

Cool 1 &2 opened opened

Emergency fully fully

vent opened closed

Smoke fully fully

vent closed Opened


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PNEUMATIC & BRAKE SYSTEM

Pneumatic system is mainly used in five items in metro Brake System, Coupler,

Suspension, Horn and Pantograph. But pneumatic system work in a unit with

common input and different outputs i.e. having a common air supply equipmentwhich supply air at high pressure in two pipes named MAIN PIPE (M.P.) &

BRAKE PIPE (B.P.) and other equipment tapped pressure from it. Hence it has

been configured as follows:-

Configuration

A - Air Supply equipment - DT, T

B - Brake Control equipment - DT, T, M

C - Mechanical Brake Actuating component - DT, T, M

G - Wheel Side Protection equipment - DT, T, ML - Air Suspension equipment - DT, T, M

P - Pneumatic Horn equipment - DT

U - Auxiliary Air Supply equipment - DT, T,

W - Automatic Coupler Actuating equipment - DT, T, M

A) AIR SUPPLY EQUIPMENT

Its mainly consist of three parts:-

1) Piston Compressor (VV120)

2) Air Dryer Unit (LTZ015 H)

3) Air Reservoir

Piston

compressor VV120

Air dryer unit

LTZ015-H

Air

Reserv

oir

Air


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1.Piston Compressor

There are two type of compressor:-

i. Main compressor:-

1. Discharge air pressure max. 10 bars.

2. Nominal discharge capacity 900 L/min.

3. Type piston type.

4. motor 3, 415V AC, 50 Hz,

induction motor

ii. Auxiliary air compressor

1. Nominal discharge capacity - 70 L/min

2. motor - 110V DC, 860W,10

minute rating

Features of piston compresseor:-

It is W- Shaped 3-Cylinder Unit with 2-

Stage compression reciprocating typecompressor (see fig.).

i. Extremely short design.

ii. Optimum cooling for all cylinders.

It have self-supporting, Flange- Mounted,

Motor compressor set.

i. No additional frame needed.

ii. Small installation space.

It creates very low sound pressure level.

i. Only about 64db(A)/4.6m (76db/1.0m)

It have closed circuit splash type lubrication

i. Which allow low oil consumption.


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It have forced air cool type ******** heat exchanger i.e.

radiator.

Its cooler Fan speed control by temperature.

It also has a torsion ally rigid bellow type coupling between

motor and compressor which allow no rotary vibration. It is mounted with car by wire rope isolators for no resonance

throughout the whole compressor speed range.

Compressor can be drive by AC, DC and hydraulic motor i.e.

very low specific power consumption

i. It also has low breakaway torque for low starting current

even at low temperature.


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2) Air Dryer Unit (LTZ015 H)

At very high pressure when air is cooled some component of it condense in to

liquid which make air wet. So that why an air dryer unit mounted which

perform following function on air:-

1) Dries the air.(Two column unit)

2) Separate oil & liquid from it.(Oil separator)

3) Filter the foreign partial from it.(MicroFilter)

4) And act as silencer for out going air to reduce noise.(Air

silencer)


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19a Tower

19b Tower

19.7 Desiccant

19.11 Oil separator bowl withRanching rings

24 Valve cone for check valve

25 Bracket34 Duplex piston valve

3.Air Reservoir

There are 2 type of reservoir Main reservoir & Auxiliary reservoir

1) Main reservoir can have 200L of air.

2) Auxiliary reservoir can have _______L of air.

B.BRAKE CONTROL EQUIPMENT

The brake system is one of the most important parts of metro and it is controlled

and designed to interface with TIMS(Train Integrated Management System)

with electrical and pneumatic controls. The two think must be taken inconsideration while designing brake system:-

1) Wheel slide protection

2) Fail safe system

92.93 Insulators

(on LTZO15..H)

A Drainage port

O.. Exhaust portP1 Air supply port

P2 Air pipeconnection tomain reservoir

V... Valve seat

34.15 KNORR K-ring

34.17 KNORR K-ring

43 Valve magnet

50 Regeneration choke

55 Piston for pre controlvalve56 KNORR K-ring

70 KNORR K-ring

71 Valve head for bypassvalve


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Main component of brake system are:-

1) BP (Brake Pipe)

2) BCU (Brake Control Unit)

3) BECU (Brake Electronic Control Unit)

4) ASV (Anti Skied Valve)

5) BBU (Block Brake Unit)

1) BAKE PIPE

a. It is a tapped pipe from MRP (Main Reservoir Pressure).

b. Its max. pressure is 5 bar

c. Its used only for braking propose.

2) BRAKE CONTROL UNIT

It is a single board which consist many type

valves as shown in fig.

It has analogue control valve which convert

signal from BECU to required pressure.

a. Combination of different valve used for

different purpose:-

i.A & B used for service brake.

ii.C, D & E used emergency brake.

iii.F & G used for auxiliary unit.

iv.J, L, M & N used for testing fittings

Different type of braking:-

i. Service brakeii. Blend brake

iii.Emergency brake

iv. Parking brake

v. Holding brake

vi. BP- back up brake


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i. SERVICE BRAKE :-

a. It is ED (Electro Dynamic) brake.

b. It is also Regenerative brakes

c. In this motor work as generator and back

EMF is produce which recharge the battery.

d. And due to generative action and opposite

field a braking force is applied on the motor.

e. This brake is controlled by C/I of M car.

ii. BLEND BRAKE

f. It is blending of ED (Electro Dynamic) brake

& EP (Electro Pneumatic) brake.

g. It is applied when only ED brake is not

sufficient.

h. Then the remaining amount of brake is

applied by EP brake

i. EP brake is control by DT car. Hence blend

brake is collectively controlled by DT & M

car.

M car DT car

Train line

brake demand

Blending request

TCU TCU

BECU

BECU


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F set by M & DT

F set by M EP

ED

V1 V2

iii. EMERGENCY BRAKE

j. The train set is equipped with an emergency

brake loop wire. The emergency brake loop is

connected to the emergency brake magnet

valve. Which is opened when de-energized

and closed when energized (Fail-safe system).

k. Magnet valve is de-energies by driver or

interruption it by pass the MRP i.e. MRP

become 0 bar

l. Analogue control valve on BCU produce a

request signal using load limiting value.

m. Redundancy realized for the emergency brake

pressure generation.

iv. PARKING BRAKE

n. Parking brake is used for parking the train in

depot and these are installed at Driving trailercar and Motor cars (1 set per axle).

o. It can be operated manually or by TIMS.

p. It is spring actuated brake.

q. In this first MRP pressure goes low (< 4.5

bar) by any mean it release the pressure from

spring and brake applied.


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v. HOLDING BRAKE

r. The holding brake is provided to prevent the

train from rolling backwards on a rising

gradient and the train from moving at the

station.

s. This brake is controlled by C/I of M car.

t. The holding brakes are 70% of full service

brakes.

vi. BP- BACK UP BRAKE

u. Additional BP (Brake pipe) controlled back-

up brake system is provided in order to take

over the brake control function in case of

failure of individual electronic or electrical

control elements. The driver can continue to

control the pneumatic friction brake by using

the driver's brake valve.

v. The driver is able to apply or release the

pneumatic brake by operating the driver's

brake valve.

w. By the brake valve the brake pipe (BP)

pressure can be reduced or increased

depending on the time the brake lever is

maintained at "braking" or "driving". During

the normal service brake operation, the drivers

brake valve lever shall be maintained at

"driving"

C.BRAKE ELECTRONIC CONTROL UNIT

1.It is microprocessor based control system which deals with many type

of signal.

2.It works as an interface between TIMS & BCU.


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D. ASV (Anti Skied Valve)

Wheel slide protection is used to optimize the stopping distance and to avoidthe wheel flats under wheel sliding conditions. Wheel slide protection is active

in service brake andEmergency brake.The wheel slide protection acts per bogie on each car by thedump valves (G2).

Wheel-slide protection is operational at all speeds down to 3 km/h.Speed sensormounted on the cover of each axle box, detects the speed of the associatedwheel.

When a potential wheel-slide event is detected, the BECU will release/apply thebrakes through energizing/ de-energizing the magnets of the dump valves oranti skied valve

1 Econnection

2 Double valve

magnet

3 Plate

4 Anchor spring

5 Housing

6 D piston

7 Compressingspring

8 Control

chamber

9 Valve seat Vd10 Bypass nozzle

11 Nozzle D

12 Bracket

13 To brake

cylinder

pressure

supply

14 To the brake

15 Nozzle C

16 Valve seat Vc17 C-piston


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18 Control

chamber

19 Outer valve

seat

20 Inner valve

seat

Block Brake Unit

1 Piston packing ring 44 Compensating link

2 Piston 45 Bracket

3 Piston return spring 46 Return spring

4 Piston pin

5 Cam disc

6 Bearing pin


24/33

7 Cam roller

8 Trust ring

9 Adjuster mechanism

10 Hexagon reset head

11 Ball shaped rod head

12 Torque pin

13 Brake block wedge

14 Brake block shoe

15 Brake block

16 Link pin

17 Hanger

18 Friction member

19 Hanger pin

20 Torsion sprin

L)AIR SUSPENSION EQUIPMENT


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26/33

TYPES OF DOOR

PARTITION DOOR

CAB SIDE DOOR

SALOON DOOR

EMERGENCY DOOR

ISOLATION

SWITCH

110 V DC

SUPPLY

DOOR CONTROL UNIT

(DCU)

INPUT SIGNALS

1. CLOSE SIGNAL

2. LOCK SIGNAL

3. EMERGENCY SIGNAL

4. ZERO SPEED SIGNAL

OPEN/CLOSE

COMMAND

TIMS

SOLENOID

MOTOR ENCODER

SPINDLE SHAFT

SPINDLE NUT

DRIVE BRACKET

DOOR PANEL

DOOR

OPEN/CLOSE

BLOCK DIAGRAM OF SALOON DOOR OPERATION


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COUPLERTypes of couplers:

Automatic coupler


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It enables automatic coupling of 2 mechanical units. Besides mechanical

coupling, electric and pneumatic coupling is also achieved.

Semi permanent coupler

It make semi-permanent connection of two cars those form a unit and therefore

need not be separated unless in an emergency or in the workshop for

maintenance.

Types of Coupler

1. Automatic Front Coupler

Coupler Length (from face to pivot) 1350 5 mm

Coupler Weight approx. 485 kg

Maximum Swing of coupler

Horizontal approx 45Vertical approx. 6

2. Automatic Intermediate coupler




Horizontal approx 45

Vertical approx. 6

3. Semi Permanent Coupler




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Horizontal approx 45

Vertical approx. 6


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CONCLUSION

There were many things that I have experience and learned during the eight

weeks of my training in DMRC .The whole training period was very

interesting, instructive and challenging. Through this training I was able to gain

new insights and more comprehensive understanding about the real industry

working condition and practice.

The training provided me opportunities to understand the basic engineering

concepts.

This training was mainly concentrated on study of various parts of Delhi metro

rail corporation and its designing .

At the end I would like to thank all employees in DMRC for giving me

necessary support and guidance in order to bridge the gap between my

knowledge and the industry practices.


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BIBLIOGRAPHY

1. Material Available on DMRCs INTRANET.

2. Material Available In DMRC STUDY BOOKS.

3. Material available On Wikipedia.

dmrc project (mech).doc

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